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CVE-2026-0672

Header injection in http.cookies.Morsel

Published: Jan 20, 2026Updated: Jan 26, 2026 Sources: CVE List NVD BDUCWE-93
7.1HIGH
NVD MITRE
EPSS Score
0.4%
Top 67.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

When using http.cookies.Morsel, user-controlled cookie values and parameters can allow injecting HTTP headers into messages. Patch rejects all control characters within cookie names, values, and parameters.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LC:NI:LA:H
Exploitability
AV:NAccess Vector
Network
AC:LAccess Complexity
Low
Impact
C:NConfidentiality
None
I:LIntegrity
L
A:HAvailability
H
Open in CVSS calculator →

Weaknesses

CWE-93

Affected Products

Python Software Foundation
oss-project·USaka psf
CPython
OSS Libraries
PythonLibraryLibrary
OSS Libraries
Red Hat Inc.
commercial·USaka red hat
Red Hat Enterprise LinuxOn-premOS
Operating Systems / linux-distro
Red Hat Enterprise Linux AIOn-prem
Operating Systems / linux-distro
ООО «РусБИТех-Астра»
commercial·RUaka rusbitech-astra
Astra Linux Special EditionOn-premOS
Operating Systems / linux-distro
ООО «Ред Софт»
commercial·RUaka red soft
РЕД ОСOn-premOS
Operating Systems / linux-distro
АО «СберТех»
commercial·RUaka сбертех, ao sbertech
Platform V SberLinux OS ServerOn-premOS
Operating Systems / linux-distro

Exploitability

Official Patch Available
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References

https://github.com/python/cpython/commit/62700107418eb2cca3fc88da036a243ea975f172
github.com
https://github.com/python/cpython/commit/712452e6f1d4b9f7f8c4c92ebfcaac1705faa440
github.com
https://github.com/python/cpython/commit/7852d72b653fea0199acf5fc2a84f6f8b84eba8d
github.com
and 11 more references View all →

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